New 3T8705 Glow Plug Replacement suitable for Caterpillar Equipment
- New Glow Plug Replacement suitable for Caterpillar Equipment
- Made to USA Specification
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Description for 3T8705 Glow Plug
â–¶Specification for 3T8705 Glow Plug
â–¶Exact Fit Guarantee for 3T8705 Glow Plug
â–¶| Models | 3204 |
|---|---|
| Dimensions | 3.50x6.00x0.08 |
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Awesome and diligent support. Would definitely recommend
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Excelente servicio rapido, responsable y confiable
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Great customer service answered email question quickly.
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Great customer service.
Prompt , knowledgeable and friendly service. -
Excellant customer service!
The prices are very good! The customer service is excellant! I had to contact them because our tax info wasn't right and they refunded it on the spot! Great job! we will be doing a lot more ordering from thi company. Highly recommended!
Frequently Asked Questions
What is the 3T8705 plug used for?
The 3T8705 is a plug used to close a port or serve a starting/ignition role depending on the application, keeping the system sealed or running correctly.
How do I install the 3T8705 plug?
A reliable installation of the 3T8705 starts with inspection and ends with verification. Follow this process:
- Shut off and cool the engine, then disconnect power if electrical
- Remove the old plug and clean the threads and seat
- Inspect the bore and threads for damage
- Thread the 3T8705 in by hand, then torque to specification
- Reconnect any wiring and test for correct operation
Which Caterpillar machines is the 3T8705 compatible with?
Compatibility for the 3T8705 plug varies by machine and configuration, so cross-check it for your Caterpillar equipment before ordering. Or reach out to Propel Parts for help verifying fitment.
Does the 3T8705 plug meet performance standards?
Yes. The 3T8705 is engineered to meet OEM specifications for material, dimensions, and durability. When replacing, choose genuine or high-quality aftermarket parts that meet or exceed OEM specifications so the part performs the way it was designed to.
How often should the 3T8705 be replaced?
The 3T8705 is typically renewed during scheduled service or a related repair. In demanding, high-hour operation, inspect it more often to stay ahead of wear. The 4200652 Seal Water is often renewed during the same service, so many technicians replace both at once to reduce downtime.
What are the signs of a worn or failing 3T8705 plug?
Catching a failing 3T8705 early prevents wider damage. The common warning signs include:
- Leaks or loss of pressure at the plug
- Hard starting or rough running (for heating/ignition types)
- Corroded or damaged threads
- Warning indicators related to the circuit
Why is the 3T8705 plug important, and what related part is commonly replaced with it?
Keeping the 3T8705 in good condition protects the components around it and supports smooth, reliable operation. Maintaining the assembly with parts that meet OEM specifications helps you avoid unplanned downtime. For a complete repair, the 8B3410 Gasket is another component from the same assembly that is commonly replaced at the same time.
This 3T8705 Glow Plug is compatible with the following models:
3204 & more...

We know equipment downtime costs money, so fast and reliable shipping is a priority at Propel Parts. Orders placed on weekdays before 3:00 PM ET typically ship the same day, with expedited delivery options available for many locations when time is critical.
We ship across the U.S., Canada, and over 130 countries worldwide, helping customers keep machines running wherever they operate. Available shipping methods and delivery estimates are shown at checkout so you can select the option that best fits your timeline.
Tracking information is emailed within 24–48 hours after your order is processed, giving you full visibility from dispatch to delivery and peace of mind that your parts are on the way.

Our refund policy is simple. We offer a 30-day, no-hassle return policy, and we make every effort to provide the best service and highest-quality parts possible. If you’re not fully satisfied with your purchase, you may return it within 30 days for a refund. Full details are available on our Returns Policy page.

Buy with confidence. All parts from Propel Parts are covered against material or manufacturer defects for 12 months from the original invoice date. We stand behind every part we sell, so you can count on reliable performance and dependable support. Full details are available on our Warranty Policy page.
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